chongweiC

Problem:
Custom Language switcher is not aligned with rest of the elements in the site.

Solution:
Custom language switcher is not expected to align automatically and the alignment depends on how your theme CSS is coded. Use Custom CSS to fix the alignment as required.

In this case the required CSS was, however this might not work for all sites:

.wpml-ls-legacy-dropdown {
padding-left: 20px;
display: inline-block;
}
.top-nav ul ul.wpml-ls-sub-menu{
    display:block;
}

Relevant Documentation:
https://wpml.org/documentation/getting-started-guide/language-setup/language-switcher-options/custom-language-switcher/